Laumontite, a calcium aluminum silicate hydrate mineral of the zeolite group, was reported from Sterling Hill in 1983 by Fred Parker in The Picking Table, 24, #2, p. 8. It occurred as flattened, radiating sprays of milky-white crystals up to 2 mm in maximum dimension on a carbonate matrix. It was verified using X-ray diffraction and chemical analytical methods. (Dunn, 1995)

 Location Found: Ogdensburg
 Year Discovered: 1805
 Formula: CaAl2Si4O12 · 4H2O
 Essential Elements: Aluminum, Calcium, Hydrogen, Oxygen, Silicon
 All Elements in Formula: Aluminum, Calcium, Hydrogen, Oxygen, Silicon
 IMA Status: Approved 1805
 To find out more about this mineral at minDat's website, follow this link   Laumontite

Dunn, Pete J. (1995). Franklin and Sterling Hill New Jersey: the world's most magnificent mineral deposits. Franklin, NJ.: The Franklin-Ogdensburg Mineralogical Society. p.514

The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 24 No. 2 - Fall 1983, pg. 8Mineral Notes New To The Deposit, Laumontite
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